Materials for a Flora of the Malayan Peninsula. 237 



of P. microphyllum Kurz ; fcliat il cannot possibly be the true P. microphyll'"'^^ ^^^q- 

 is obvious from the fact that Miquel's plant has linear leaflets smaller than those of 

 his P. laeerans — which is the P. macropterum of this work — arranged in from 20- 

 22 pairs on 14-16 pairs of pinnae, whereas P. densijloruin has oblong leaflets larger 

 than those of P. macropteruin, arranged in from only 7-8 pairs on 4-8 pairs of pinnae. 

 Mr. Karz's misidentification no doubt arose from the fact that he had not seen the 

 leaves of Maingay's plant. In style of inflorescence P. densiflorum most resembles 

 the Chinese P. punctahim Hemsl., but that plant has less dense and less numerously 

 flowered racemes, and has very different leaves. 



Suborder IIT. Mimose^. 



Trees, slirubs or very rarely herbs. Leaves 2-pinnate, very rarely 

 simply pinnate. Flowers small, rarely elongated, tubular, sessile in 

 globose heads or cylindric spikes, rarely shortly pedicelled and in globose 

 umbels or slender racemes ; bracts small narrow often dilated at tlie 

 tips, substrobilately imbricate in bud usually deciduous during flower- 

 ing ; bracteoles very rare ; perianth regular often in 5-merous, some- 

 times 4-merous, rarely 3-merous or 6-merous whorls. Sepals valvate 

 (except in Parkiese), rarely free, usually connate in a 5-toothed to 5-lobed 

 tube, sometimes ; disc-tube 0. Petals as many as sepals, valvate, free 

 oi' coimate in a lobed tube, hypogynous or obscurely periiJfynous. Sta- 

 mens as man3% or twice or thrice as many, as petals, or indefinite, free 

 or monadelphous, or adnate to base of corolla tube, usually exserted ; 

 anthers small, versatile, dehiscing longitudinally. Ovai'y free at base 

 of calyx. Seeds usually ovate or orbicular, compressed, with basilar 

 hilum ; rarely thick globose or ovoid ; testa hard, albumen 0, or scanty ; 

 cotyledons flat ; radicle straight, shortly exserted or included ; funiculus 

 often expanded in a small fleshy arillus. 

 Anthers gland-tipped ; (stamens 5—10) : — 



Calyx-teeth short, imbricated (Parkiex) ; filaments usually 

 either connate or adnate at base ; (inflorescence capitate ; 

 heads very large ; trees) ... ... ,,. 58. Parkia. 



Calyx valvate (Adenanthereas) ; filaments free: — 

 Inflorescence elongated; (species all woody): — 

 Flowers sessile ; great climbers with opposite leaflets 

 and huge pods and seeds ... ... ... 59. Entada. 



Flowers short-stalked ; trees with alternate leaflets 



and narrow contorted pods ... ... ... 60. Adenanthera. 



Inflorescence capitate ; heads small : — 



Small aquatic or subaquatic herbs with small thin 

 pods opening early by upper suture ; seeds small ... 61. Neptdnia. 

 Lofty trees with large thick woody pods, late in 

 dehiscing, opening by both sutures; seeds large ... 62. Xylia. 

 Anthers not gland-tipped ; (calyx valvate, rarely 0) : — 

 Filaments free : — 



Stamens definite, as many, or twice as many as petals 



237 



